Loudspeaker



FIG. 1 is a front elevation view of a loudspeaker incorporating my new design;

FIG. 2 is a rear elevation view of the loudspeaker;

FIG. 3 is a top plan view of the loudspeaker;

FIG. 4 is a right side elevation view of the loudspeaker; and

FIG. 5 is a perspective view of the loudspeaker. 

The ornamental design for loudspeaker, as shown and described. 